CN117757527A - Integrated gasification furnace for solid-liquid segmented deslagging and production method of green chemical product - Google Patents
Integrated gasification furnace for solid-liquid segmented deslagging and production method of green chemical product Download PDFInfo
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- 238000002309 gasification Methods 0.000 title claims abstract description 149
- 239000007788 liquid Substances 0.000 title claims abstract description 48
- 239000000126 substance Substances 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000002893 slag Substances 0.000 claims abstract description 89
- 239000002699 waste material Substances 0.000 claims abstract description 72
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- 239000002028 Biomass Substances 0.000 claims abstract description 39
- 239000007787 solid Substances 0.000 claims abstract description 26
- 238000002485 combustion reaction Methods 0.000 claims abstract description 24
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 13
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- 238000009826 distribution Methods 0.000 claims description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 5
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- 239000007789 gas Substances 0.000 description 37
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- 238000003786 synthesis reaction Methods 0.000 description 23
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- 238000005265 energy consumption Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
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Abstract
The invention discloses an integrated gasification furnace for solid-liquid segmented deslagging and a production method of green chemical products, and relates to the technical field of gasification furnaces. The solid-liquid sectional deslagging integrated gasification furnace comprises: the device comprises a primary gasification furnace, a secondary gasification furnace, a water-cooled wall waste boiler and a chilling chamber, wherein the primary gasification furnace is provided with a primary exhaust port, a solid slag discharge port and a primary burner; the secondary gasification furnace is provided with a secondary exhaust port, a liquid slag discharge port and a secondary burner; the first-stage exhaust port is communicated with an inlet of the water-cooled wall waste boiler, the solid slag discharge port is communicated with the second-stage exhaust port, and the liquid slag discharge port is communicated with the chilling chamber; the primary combustion chamber of the primary gasification furnace is made of refractory bricks, and the secondary combustion chamber of the secondary gasification furnace is made of water-cooled walls. According to the invention, the high-volatile biomass raw material enters the primary gasification furnace to be gasified at low temperature to generate solid waste residues, and the high-ash-melting-point biomass raw material enters the secondary gasification furnace to be gasified at high temperature to generate molten liquid waste residues, so that the defects of the two raw materials can be mutually compensated, and the gasification efficiency is maximized.
Description
Technical Field
The invention relates to the technical field of gasifiers, in particular to an integrated gasifier for solid-liquid staged deslagging and a production method of green chemical products.
Background
At present, the high-volatile raw material gasification furnace is mainly a circulating fluidized bed low-pressure gasification furnace:
biomass (or lignite with high volatile matter) is used as a raw material, gasification is carried out in a circulating fluidized bed, when the reaction temperature is lower than 1000 ℃, the temperature is lower than the melting point of ash, the biomass belongs to solid slag discharge, but the reaction temperature is low, the carbon conversion rate is low, the gasification efficiency is low, the biomass belongs to a low-pressure category, the subsequent pressurization is needed, the energy consumption is high, and the biomass is not in advance of industrial operation only in a theoretical layer.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide an integrated gasification furnace for solid-liquid segmented deslagging and a production method of green chemical products.
The invention is realized in the following way:
in a first aspect, the present invention provides an integrated gasification furnace for solid-liquid staged slag removal, comprising: the device comprises a primary gasification furnace, a secondary gasification furnace, a water-cooled wall waste boiler and a chilling chamber;
the primary gasification furnace is provided with a primary exhaust port positioned at the top, a solid slag discharge port positioned at the bottom and a primary burner positioned at the middle lower part and used for introducing high-volatile biomass raw materials; the secondary gasification furnace is provided with a secondary exhaust port positioned at the top, a liquid slag discharge port positioned at the bottom and a secondary burner positioned at the middle lower part and used for introducing biomass raw materials with high ash melting point; the first-stage exhaust port is communicated with an inlet of the water-cooled wall waste boiler, the solid slag discharge port is communicated with the second-stage exhaust port, and the liquid slag discharge port is communicated with the chilling chamber; the primary combustion chamber of the primary gasification furnace is made of refractory bricks, and the secondary combustion chamber of the secondary gasification furnace is made of water-cooled walls.
In an alternative embodiment, the solid slag discharging port is provided with an inner wall and an outer wall which are made of refractory bricks, the inner wall and the outer wall are arranged at intervals to form an annular channel for the synthesis gas in the secondary gasification furnace to enter the primary gasification furnace, and the inner wall encloses a slag discharging channel for the waste slag in the primary gasification furnace to enter the secondary gasification furnace;
preferably, the inner wall and the outer wall of the solid slag discharging port are respectively of refractory brick structures laid on two sides of the metal plate;
preferably, the annular channel inlets and outlets are respectively provided with a plurality of distribution plates.
In an alternative embodiment, 3-5 groups of thermocouples used for monitoring the temperature gradient in the primary combustion chamber are sequentially arranged on the side wall of the primary combustion chamber along the vertical height of the side wall.
In an alternative embodiment, the temperature within the primary combustion chamber is in the range of 1000-1200 ℃.
In an alternative embodiment, an annular water pipe is arranged at the position of the primary exhaust port, and a plurality of nozzles for blocking ash are arranged on the annular water pipe.
In an alternative embodiment, the primary burner and the secondary burner are arranged on the side wall, and the number of the primary burner and the secondary burner is 2-8;
preferably, the primary burner and the secondary burner are rotatable at an angle of less than 5 ℃.
In an alternative embodiment, the water-cooled wall waste boiler comprises a first section waste boiler, a second section waste boiler and a third section waste boiler which are sequentially communicated, wherein an inlet of the first section waste boiler is communicated with the primary exhaust port, the first section waste boiler has no inner core, and the second section waste boiler and the third section waste boiler are both provided with inner cores;
preferably, the first section waste pan comprises a vertical section and an inclined section, the vertical section is communicated with the first-stage exhaust port, two ends of the inclined section are respectively communicated with the vertical section and the second section waste pan, the second section waste pan and the third section waste pan are vertically arranged, and the second section waste pan is located above the third section waste pan.
In an alternative embodiment, a support plate for supporting the liquid slag discharge port is arranged at the liquid slag discharge port, and the support plate is of a water jacket structure;
preferably, the chilling chamber is of a water jacket structure.
In a second aspect, the invention provides a method for producing a green chemical product, comprising: simultaneously treating a high-volatile biomass feedstock and a high ash fusion point biomass feedstock with an integrated gasifier for solid-liquid staged slag removal according to any of the preceding embodiments to produce a green raw material gas;
and preparing a green chemical product by taking the green raw material gas as a raw material.
In an alternative embodiment, the green feed gas comprises green CO, H 2 、CO 2 And high pressure superheated steam;
preferably, the green chemical product comprises green methanol, green ammonia or green aviation oil.
The invention has the following beneficial effects:
the integrated gasification furnace for solid-liquid segmented slag discharge provided by the invention gasifies different types of biomass or carbon-containing base raw materials according to properties at different temperatures, wherein the high-volatile biomass raw materials enter a first-stage gasification furnace for low-temperature gasification to generate solid waste residues, the high-ash-melting-point biomass raw materials enter a second-stage gasification furnace for high-temperature gasification to generate molten liquid waste residues, and the defects of the first-stage gasification furnace and the second-stage gasification furnace can be mutually compensated by the arrangement of the first-stage gasification furnace and the second-stage gasification furnace, so that the gasification efficiency is maximized. Second, synthesis gas (in co+h) obtained by gasification of biomass feedstock 2 Mainly) and steam are combined to prepare green chemical products, and CO discharged after the green chemical products are combusted 2 The biomass is converted by forestry carbon sink and other modes, so that sustainable circulation of carbon is realized, and carbon balance in the atmosphere is maintained. The solid-liquid sectional deslagging integrated gasifier provided by the invention thoroughly realizes the use problem of high-volatile raw materials, especially high-volatile biomass raw materials, in the entrained-flow gasifier, the gasifier adopts the solid-liquid multi-mode sectional deslagging integrated gasifier, the gasification advantages of different raw materials are reflected by different gasification temperatures and deslagging modes, meanwhile, the disadvantages of the gasifier are complemented, the gasification efficiency is improved to the greatest extent, meanwhile, the combustion chamber structure also adopts different hot wall and cold wall structures, the operation is safe, the equipment maintenance cost is low, the safety and reliability are realized, and the process of green chemical products such as green aviation oil, green methanol and the like, which are prepared from high-volatile biomass and high-ash-melting-point biomass raw materials, is thoroughly opened, so that the sustainable recycling of carbon is realized. Meanwhile, the technology has the remarkable advantages of safe and reliable operation, high online operation rate, convenient operation and maintenance, low operation economic cost, low comprehensive energy consumption and the like, and the economic value is greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an integrated gasification furnace for solid-liquid staged slag removal according to a first embodiment of the present disclosure;
FIG. 2 is a partial enlarged view of a primary gasifier and a secondary gasifier in an integrated gasifier for solid-liquid staged slag removal according to a first embodiment of the present application;
FIG. 3 is a schematic view of the inner wall, outer wall and distribution plate of the solid slag discharging port in the integrated gasification furnace with solid-liquid stage slag discharging according to the first embodiment of the present application;
fig. 4 is a process flow chart of a method for producing a green chemical product according to a second embodiment of the present application.
Icon: 100-an integrated gasification furnace for solid-liquid segmented deslagging; 110-a primary gasifier; 111-a first-stage exhaust port; 1111-annular water pipe; 1112-nozzles; 112-a solid slag discharge port; 113-a primary burner; 114-a thermocouple; 115-inner wall; 116-outer wall; 117-annular channel; 118-a slag discharging channel; 119-a distribution plate; a 120-secondary gasifier; 121-a secondary exhaust port; 122-a liquid slag discharge port; 123-secondary burners; 124-a support plate; 130-water-cooled wall waste pan; 131-a first section of waste pan; 132-a second section waste pan; 133-a third section of waste pan; 134-an inner core; 135-vertical section; 136-an inclined section; 140-a quench chamber; 201-refractory bricks; 202-a water-cooled wall structure; 203-water jacket structure.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
First embodiment
Referring to fig. 1 and 2, the present invention provides an integrated gasification furnace 100 for solid-liquid staged slag removal, which comprises: a primary gasifier 110, a secondary gasifier 120, a water wall waste pan 130, and a quench chamber 140.
Next, the structure and principle of the above-described primary gasification furnace 110, secondary gasification furnace 120, water wall waste pan 130, and quench chamber 140 will be described in detail.
(1) First-stage gasification furnace 110
In this embodiment, the primary gasification furnace 110 adopts solid slag discharge, mainly for solving the problem that the raw materials are high volatile substances (raw materials are biomass or brown coal with dry ash-free radical volatile content more than 65 percent, etc.), ensuring high gasification effective gas yield and CO 2 Low, therefore, the primary gasification furnace 110 is performed using a low temperature gasification furnace and a slag-off solid technology.
Specifically, the primary gasification furnace 110 is provided with a primary exhaust port 111 at the top, a solid slag discharge port 112 at the bottom, and a primary burner 113 at the middle lower portion for introducing a high-volatile biomass feedstock.
Wherein, the primary combustion chamber of the primary gasification furnace 110 is made of refractory bricks 201, which mainly solves the problem that the water-cooled wall of the solid slag-discharging cold fireplace cannot be used for slag hanging, 3-5 groups of high-temperature thermocouples 114 for monitoring the temperature gradient in the primary combustion chamber are sequentially arranged on the side wall of the primary combustion chamber along the vertical height of the side wall, and the plurality of high-temperature thermocouples 114 can realize strict control of the reaction temperature in the working process of the primary combustion chamber, in the embodiment, the temperature in the primary combustion chamber is controlled at 1000-1200 ℃.
The primary burners 113 are arranged on the side wall, and the number of the primary burners 113 is 2-8; the primary burner 113 is rotatable, but has a small rotation angle, for example, a rotation angle of less than 5 ℃ (centripetal deviation angle), so as to ensure that the raw material entering the primary gasification furnace 110 from the primary burner 113 is as close to the center as possible, which is beneficial to reducing the amount of slag on the wall surface and leading the generated slag to be as close to the center as possible.
After the materials in the primary combustion chamber are combusted and gasified, the generated waste residues are discharged from the solid residue discharge port 112, and the generated synthesis gas is discharged from the primary gas discharge port 111 and enters the water-cooled wall waste boiler 130.
Wherein the solid slag discharging port 112 is communicated with the secondary gasification furnace 120, so that the slag generated in the primary combustion chamber enters the secondary gasification furnace 120 in a solid slag discharging manner.
Referring to fig. 2 and 3, in the present embodiment, the solid slag hole 112 is provided with an inner wall 115 and an outer wall 116 made of refractory bricks 201, the inner wall 115 and the outer wall 116 are arranged at intervals to form an annular channel 117 for the synthesis gas in the secondary gasification furnace 120 to enter the primary gasification furnace 110, and the inner wall 115 encloses a slag discharging channel 118 for the waste slag in the primary gasification furnace 110 to enter the secondary gasification furnace 120; the annular channel 117 is provided with a plurality of distribution plates 119 at the inlet and outlet, respectively. Wherein, the refractory bricks 201 are built on two sides of the metal plate to form an inner wall 115 and an outer wall 116, and the arrangement of the refractory bricks 201 can effectively prevent the metal wall surface from being overtemperature, and can also prevent the slag and fly ash in the slag discharging channel 118 from being cooled, and further can also prevent the synthetic gas generated by secondary gasification from entraining slag to cool and block the channel. The distribution plate 119 in this embodiment can uniformly distribute the synthesis gas generated by the secondary gasifier 120 into the annular channel 117, and the distribution plate 119 can also support the inner wall 115 and the outer wall 116, so as to improve the stability of the solid slag notch 112.
The synthesis gas generated in the secondary gasification furnace 120 enters the primary gasification furnace 110 from bottom to top through the annular channel 117, and the upward flow CO containing gas is generated in the secondary gasification furnace 120 2 The slag flowing along the conical surface of the bottom of the primary gasification furnace 110 is blown up again by the high-temperature gas of (2) to ensure that the carbon and CO remained in the slag 2 Fully contacted, increase the mixing residence time, thereby accelerating the carbon and CO 2 And (3) reacting. The synthesis gas in the secondary gasification furnace 120 enters the primary gasification furnace 110, and can additionally provide a heat source for the primary gasification furnace 110, and simultaneously reduce oxygen required by the reaction in the primary gasification furnace 110, so that high volatile raw materials (biomass or dry matter) in the primary gasification reactionMore than 65 percent of dry ash-free volatile components) generates little carbon dioxide under the deep under-oxygen environment, but the carbon conversion rate is reduced due to low gasification temperature, the carbon residue is increased, and the unreacted carbon residue and solid ash slag of the primary gasification are utilized to carry out downward and upward secondary gasification to generate CO 2 The high temperature gas is in countercurrent contact with the upper part and the lower part of the primary gasification in the secondary gasification, so that after carbon reacts with carbon dioxide to generate carbon monoxide, the residual carbon enters a secondary gasification reaction zone to further react with oxygen of the secondary gasification to generate carbon monoxide, and the temperature of the synthesis gas generated by the secondary gasification furnace 120 in the primary gasification furnace 110 is reduced to about 110 ℃ due to the mixing of the synthesis gas and the primary synthesis gas and the endothermic reaction. The primary exhaust port 111 is communicated with the inlet of the water-cooled wall waste boiler 130, and the mixed gas of the synthesis gas generated by the primary gasification furnace 110 and the secondary gasification furnace 120 enters the water-cooled wall waste boiler 130 for cooling.
In the present embodiment, an annular water pipe 1111 is disposed at the position of the primary exhaust port 111, and a plurality of nozzles 1112 for blocking ash are disposed on the annular water pipe 1111. The nozzle 1112 can realize spraying water to the position of the first-stage exhaust port 111, is favorable for reducing the ash content of the synthesis gas, further reduces ash entering the water-cooled wall waste boiler 130, and can further reduce the temperature of ash entrained in the synthesis gas from the second-stage gasification, so that the slag is prevented from being bonded to the water-cooled wall after the excessive temperature enters the waste boiler, heat exchange is affected, and a channel is seriously blocked.
(2) Two-stage gasification furnace 120
The secondary gasification furnace 120 adopts liquid slag discharge, a secondary combustion chamber of the secondary gasification furnace 120 adopts a water-cooled wall structure 202, and the secondary gasification furnace 120 is provided with a secondary exhaust port 121 positioned at the top, a liquid slag discharge port 122 positioned at the bottom and a secondary burner 123 positioned at the middle lower part and used for introducing biomass raw materials with high ash fusion point; the solid slag notch 112 communicates with the secondary exhaust 121 and the liquid slag notch 122 communicates with the quench chamber 140.
The reaction temperature in the secondary combustion chamber is mainly determined according to the ash fusion temperature and ash sticking temperature curve of slag (in actual production, the reaction temperature is determined according to the thickness of slag layer, namely the heat absorption of water of a water-cooled wall boiler of the combustion chamber), and the raw material of the secondary gasification furnace 120 is mainly from the secondary burner 123Biomass raw material with high ash fusion point, oxygen and residual carbon entrained in ash slag from the primary gasification furnace 110, wherein the ash slag from the primary gasification furnace 110 is solid, the ash slag (containing residual carbon) of the primary gasification furnace is reacted with the material fed by the secondary burner 123 in the secondary gasification furnace 120 to produce high-temperature synthetic gas and slag (the slag is from the primary gasification furnace 110 and the secondary gasification furnace 120), and the secondary gasification is required to provide a certain temperature and CO for the primary gasification 2 Therefore, the secondary gasification is more suitable for biomass raw materials with relatively high ash fusion points. The secondary gasification furnace 120 adopts a plurality of side-mounted burners, the number of the burners is 2-8, the secondary burners 123 can rotate, and the rotation angle is less than 5 ℃. The synthesis gas generated by the secondary gasification furnace 120 enters the primary gasification furnace 110 through the annular channel 117 at the outer side of the solid slag discharge port 112, and after the synthesis gas generated by the secondary gasification furnace 120 is mixed with the synthesis gas generated by the primary gasification furnace 110, the synthesis gas finally enters the water-cooled wall waste boiler 130 through the primary exhaust port 111 of the primary gasification furnace 110 for heat recovery; the ash slag generated by the primary gasification furnace 110 entering the secondary gasification furnace 120 is melted into liquid in the secondary gasification furnace 120, and then enters the chilling chamber 140 together with the slag generated by the secondary gasification furnace 120 through the slag hole of the secondary gasification furnace 120.
A support plate 124 for supporting the liquid slag discharge port 122 is arranged at the liquid slag discharge port 122, and the shell of the chilling chamber 140 and the support plate 124 are both of a water jacket structure 203.
The supporting plate 124 adopts the water jacket structure 203, which can effectively prevent the high-temperature synthesis gas from being burnt on the supporting plate 124 during the deslagging of the secondary gasification furnace 120.
(3) Water-cooled wall waste pan 130
The water-cooled wall waste boiler 130 comprises a first section waste boiler 131, a second section waste boiler 132 and a third section waste boiler 133 which are sequentially communicated, wherein an inlet of the first section waste boiler 131 is communicated with the first-stage exhaust port 111, no inner core is arranged in the first section waste boiler 131, transition and ash separation are mainly achieved, high-pressure saturated steam is produced simultaneously, the bottom of the first section waste boiler 131 is designed into a hot wall structure, ash adhesion caused by poor temperature control is prevented, and ash separated from the waste boiler is convenient to fall back into the first-stage gasification furnace 110. The second section waste pan 132 and the third section waste pan 133 are both provided with an inner core 134; wherein the third waste pot 133 also generates high pressure saturated steam, the second waste pot 132 is used for superheating the high pressure saturated steam generated by the first waste pot 131 and the third waste pot 133 (or the three waste pots all generate high pressure saturated steam, and the synthesis gas generated by the gasification furnace superheats the high pressure saturated steam through the superheating furnace). The first section waste pan 131 comprises a vertical section 135 and an inclined section 136, the vertical section 135 is communicated with the primary exhaust port 111, two ends of the inclined section 136 are respectively communicated with the vertical section 135 and the second section waste pan 132, the second section waste pan 132 and the third section waste pan 133 are vertically arranged, and the second section waste pan 132 is located above the third section waste pan 133.
(4) Quench chamber 140
The outer wall of the chilling chamber 140 is of a water jacket structure 203, so that the chilling chamber 140 can be effectively prevented from being burnt by high-temperature synthesis gas entrained in deslagging, the supporting plate 124 is of the water jacket structure, the outer wall of the chilling chamber 140 is also of the water jacket structure 203, the supporting plate 124 and the outer shell of the chilling chamber 140 can be prevented from working at an excessive temperature, slag from the secondary gasification furnace 120 enters the chilling chamber 140, coarse slag falls into a water bath at the bottom of the chilling chamber 140, a certain liquid level is controlled in the chilling chamber 140 during normal operation, the molten slag is guaranteed to fall into the quenching chamber, and then is cooled rapidly, so that coarse slag is discharged.
Second embodiment
The embodiment provides a production method of a green chemical product, which comprises the following steps: the integrated gasification furnace 100 for solid-liquid staged slag removal provided by the first embodiment is adopted to simultaneously process a high-volatile biomass raw material and a high-ash-melting-point biomass raw material to produce green raw material gas; the green raw material gas comprises green CO and H 2 、CO 2 And high pressure superheated steam;
the green raw material gas is used as a raw material to prepare green chemical products, and the green chemical products comprise green methanol, green ammonia or green aviation oil.
Referring to fig. 4, in the embodiment, the synthesis gas generated by the integrated gasification furnace 100 with solid-liquid staged slag discharge is single-chain green CO and green H without tar 2 A small amount of green CO 2 The main synthesis gas and the byproduct green steam (by-product high-pressure superheated steam of biomass) push the turbine to produce green electricity, and green electricity is produced by green energy sources such as solar energy, water energy, wind energy and the like, and then greenGenerating green hydrogen by electrolysis of water, wherein the green hydrogen is coupled to green CO and green H generated by an integrated gasification furnace 2 Little part of green CO 2 In the process, green chemical products such as green methanol, green ammonia, green aviation oil and the like are produced, and CO discharged after the green products are combusted 2 Converting into biomass by forestry carbon sink and the like, and keeping the carbon balance in the atmosphere. Biomass mainly comprises straw, wood dust, animal manure, household garbage, vinasse and the like. Realize sustainable green circulation and keep carbon balance in the atmosphere.
In summary, the integrated gasification furnace 100 for solid-liquid staged slag discharging provided by the invention gasifies different types of biomasses or carbon-containing raw materials at different temperatures according to properties, wherein the high-volatile biomass raw materials enter the primary gasification furnace 110 for low-temperature gasification to generate solid waste residues, the high-ash-melting-point biomass raw materials enter the secondary gasification furnace 120 for high-temperature gasification to generate molten liquid waste residues, and the defects of the primary gasification furnace 110 and the secondary gasification furnace 120 can be mutually compensated for to maximize gasification efficiency. Second, synthesis gas (in co+h) obtained by gasification of biomass feedstock 2 Mainly) and steam are combined to prepare green chemical products, and CO discharged after the green chemical products are combusted 2 The biomass is converted by forestry carbon sink and other modes, so that sustainable circulation of carbon is realized, and carbon balance in the atmosphere is maintained. The solid-liquid sectional deslagging integrated gasifier 100 provided by the invention thoroughly realizes the use problem of high-volatile raw materials, especially high-volatile biomass raw materials, in the entrained-flow gasifier, the gasifier adopts the solid-liquid multi-mode sectional deslagging integrated gasifier, the gasification advantages of different raw materials are reflected by different gasification temperatures and deslagging modes, meanwhile, the disadvantages of the gasifier are complemented, the gasification efficiency is improved to the greatest extent, meanwhile, the combustion chamber structure also adopts different hot wall and cold wall structures, the operation is safe, the equipment maintenance cost is low, the safety and reliability are realized, and the flow of green chemical products such as green aviation oil, green methanol and the like, which are prepared from high-volatile biomass and high-ash-melting-point biomass raw materials, is thoroughly opened. Meanwhile, the technology has the remarkable advantages of safe and reliable operation, high online operation rate, convenient operation and maintenance, low operation economic cost, low comprehensive energy consumption and the like, and is greatly improvedHas high economic value.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An integrated gasification furnace for solid-liquid segmented slag discharge, which is characterized by comprising: the device comprises a primary gasification furnace, a secondary gasification furnace, a water-cooled wall waste boiler and a chilling chamber;
the primary gasification furnace is provided with a primary exhaust port positioned at the top, a solid slag discharge port positioned at the bottom and a primary burner positioned at the middle lower part and used for introducing high-volatile biomass raw materials; the secondary gasification furnace is provided with a secondary exhaust port positioned at the top, a liquid slag discharge port positioned at the bottom and a secondary burner positioned at the middle lower part and used for introducing biomass raw materials with high ash melting point; the first-stage exhaust port is communicated with an inlet of the water-cooled wall waste boiler, the solid slag discharge port is communicated with the second-stage exhaust port, and the liquid slag discharge port is communicated with the chilling chamber; the primary combustion chamber of the primary gasification furnace is made of refractory bricks, and the secondary combustion chamber of the secondary gasification furnace is made of water-cooled walls.
2. The integrated gasification furnace for solid-liquid staged slag removal according to claim 1, wherein the solid slag removal port is provided with an inner wall and an outer wall which are made of refractory bricks, the inner wall and the outer wall are arranged at intervals to form an annular channel for the synthetic gas in the secondary gasification furnace to enter the primary gasification furnace, and the inner wall encloses a slag removal channel for the waste slag in the primary gasification furnace to enter the secondary gasification furnace;
preferably, the inner wall and the outer wall of the solid slag discharging port are respectively of refractory brick structures laid on two sides of the metal plate;
preferably, the annular channel inlets and outlets are respectively provided with a plurality of distribution plates.
3. The integrated gasification furnace for solid-liquid staged slag removal according to claim 1, wherein 3-5 groups of thermocouples for monitoring the temperature gradient in the primary combustion chamber are sequentially arranged on the side wall of the primary combustion chamber along the vertical height thereof.
4. The integrated gasification furnace for solid-liquid staged slag removal according to claim 1, wherein the temperature in the primary combustion chamber is 1000-1200 ℃.
5. The integrated gasification furnace for solid-liquid staged slag removal according to claim 1, wherein an annular water pipe is arranged at the position of the primary exhaust port, and a plurality of nozzles for blocking slag are arranged on the annular water pipe.
6. The integrated gasification furnace for solid-liquid staged slag removal according to any one of claims 1 to 5, wherein the primary burner and the secondary burner are arranged on the side wall, and the number of the primary burner and the secondary burner is 2 to 8;
preferably, the primary burner and the secondary burner are rotatable at an angle of less than 5 ℃.
7. The integrated gasification furnace for solid-liquid staged slag removal according to any one of claims 1 to 5, wherein the water-cooled wall waste pan comprises a first section waste pan, a second section waste pan and a third section waste pan which are sequentially communicated, wherein an inlet of the first section waste pan is communicated with the primary exhaust port, the first section waste pan has no inner core, and both the second section waste pan and the third section waste pan are provided with inner cores;
preferably, the first section waste pan comprises a vertical section and an inclined section, the vertical section is communicated with the first-stage exhaust port, two ends of the inclined section are respectively communicated with the vertical section and the second section waste pan, the second section waste pan and the third section waste pan are vertically arranged, and the second section waste pan is located above the third section waste pan.
8. The integrated gasification furnace for solid-liquid staged slag discharge according to any one of claims 1 to 5, wherein a support plate for supporting the liquid slag discharge port is provided at the liquid slag discharge port, and the support plate has a water jacket structure;
preferably, the chilling chamber is of a water jacket structure.
9. The production method of the green chemical product is characterized by comprising the following steps: simultaneously treating a high-volatile biomass raw material and a high-ash-melting-point biomass raw material by adopting the integrated gasification furnace for solid-liquid staged slag discharge according to any one of claims 1 to 8 to produce green raw material gas;
and preparing a green chemical product by taking the green raw material gas as a raw material.
10. The method for producing green chemical products according to claim 9, wherein the green raw material gas comprises green CO, H 2 、CO 2 And high pressure superheated steam;
preferably, the green chemical product comprises green methanol, green ammonia or green aviation oil.
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| CN202410029983.5A CN117757527A (en) | 2024-01-08 | 2024-01-08 | Integrated gasification furnace for solid-liquid segmented deslagging and production method of green chemical product |
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